[SpicyLemonZest]

I am. I would expect an age classification model to be trained on a dataset containing pictures of people with known ages and their known age.

It's true that the model might develop the same strange belief that large hands prove a Vietnamese person is not 17, if the training data is biased in that way. There's no perfect solution.

[LtWorf]

Yes but those people will be americans or europeans.